Which term is defined as a hard, brittle, heat- and corrosion-resistant material commonly used as a ceramic?

Which term is defined as a hard, brittle, heat- and corrosion-resistant material commonly used as a ceramic?

• A. Ceramic
• B. Gold
• C. Galvanic
• D. Filler

Answer: (A)

Hard, brittle materials that resist heat and corrosion are characteristic of ceramics. Ceramics are inorganic, nonmetal solids formed by shaping and firing at high temperatures. Their strong bonds give them great hardness and resistance to heat and chemical attack, but they’re brittle, meaning they can crack under impact. That combination of properties—hardness, heat resistance, corrosion resistance, and use in ceramic products—fits this term perfectly. Gold is a metal, not a ceramic, so it doesn’t match. Galvanic relates to an electrochemical process, and a filler is simply material used to fill gaps, neither of which describes the material in question.

Hard, brittle materials that resist heat and corrosion are characteristic of ceramics. Ceramics are inorganic, nonmetal solids formed by shaping and firing at high temperatures. Their strong bonds give them great hardness and resistance to heat and chemical attack, but they’re brittle, meaning they can crack under impact. That combination of properties—hardness, heat resistance, corrosion resistance, and use in ceramic products—fits this term perfectly. Gold is a metal, not a ceramic, so it doesn’t match. Galvanic relates to an electrochemical process, and a filler is simply material used to fill gaps, neither of which describes the material in question.